Manifold heater



Feb. 9 1926.

E. G. SIEGFRIED MANIFOLD HEATER Filed August 6, 1924 E.' 6. lzsne/so t INVENTOR.

CTI

Patented Feb. 9, 1926.

UNITED STATES PATRNT QFFQE.

EUGENE G. SIEGFRIED, OF LINCOLN, NEBRASKA, .ASSGNQR OF ONE-HALF T0 AUGUST Vf. VOGT, F LINCGLN, NEBRASKA.

MANIFOLD HEATER.

Application led August G, 192e.

T0 all whom t may concern.'

Be it known that I, EUGENE G. Sincrnrnn, a citizen of the United States, residine' at Lincoln, in the county of Lancast and State et Nebraska, have invented certain new and useful Improvements in laianifold Heaters, ot which the 'following' is a spec'- lication.

My invention is designed for use on internal combustion motors and it relates to that general class of devices which are adapted to facilitate the ign tion ot the Lgasoline vapor when starting the engine. ylhe purpose ot my invention is the provision oiI a manifold heater' which may he connected in such a way that it will respond instantly and automatically with the starter to heat the explosive mixture before it reaches the cylinder. lt is also my object to provice such a manifold heater which is neat anc attractive in appearance, which can be made at a low cost and which can be installed on the engine without the use ot' .special tools. Having in view these objects and others which will be pointed out in the description I will now refer to the drawings.

Figure 1 is a median longitudinal ,section of my manifold heater, the core and resistance coil being shown in full.

Figure 2 is a view and perspective of a portion of an internal combustion engine with my manifold heater attached thereto.

The heating cup 10 is lined on its sides and bottom with insulating material 11. The open end of the cylinder cup 10 is internally .screw threaded for the reception ot a shouldered plug 13. The cylinder 10 is externally screw threaded at 1:2. The plug 13 is provided with a central conical aperture for receiving the smaller end ot the conical core 1st. This core l-t is surrounded throughout its entire length by the insulation 15. Integral with the core let and projecting from its smaller end and beyond the plug is a binding post 16. Surrounding the binding post are two washers 17 and 18. The washer 17 is preferably made of rubber or other insulating material having more or less resistance, but the washer 18 is made out ot copper or other soft metal having considerable conductivity. The binding' post 16 is screw threaded for receiving` the nuts 19 and 20. It will readily be seen that the pressure ot' the nut 19 will draw the core 14 into the conical Serial No. TSOAJL socket ot the plug 13 and thus torni a sccure connection between the various At the same time the core 11T'. 's ce: insulated from the plug 13 by means insulation 15 and 17. The nut 2O i tively loose and merely serves to clam end of the wire.

Surrounding the core 11i is a resistance coil which is completely ii .n..lated troni the walls ot the cylinder 10 and troni the body ot the core. @ne term'nal ot the resist-anco coil is connected with the core 14 i c its tree end while the other terminal of the resistance coil is connected with the plug lll which constitutes the ground. The curreiit entering through the bind'ng post 1G will tra-verse through and heat the coil 21.

In Figure 2 l have indicated the manner in which niy manifold heater is applied to internal 'combustion engines. l first drll an aperture in the manifold at the junction to receive the screw threaded portion 12 of my manifold heater. I then connect the manifold heater to the battery through the same switch which controls the starter. ln Figure 2 my device as a whole is indicated by the letter A, the switch by B, the connection between the switch and the battery by C and the connection trom the switch to the starter by D.

l iind that my heater responds almost instantly when the current is turned on. rlhe current must How through the resistance coil since the coil is tl'ioroughly insulated throughout its entire length. rlhe. heating or" the coil7 however, is followed by the rapid heating ot the cylinder 10, since the heating is confined in a narrow space surrounding the coil. lt has been found by actual practice that the cylinder 10 can be heated red hot within a few seconds after the current is turned on. The manner in which the heater is connected through the starting circuit also has decided advantages, since the heat will thus be applied only when the motor is being started.

I am aware that gaskets and similar heating contrivances have been employed in the connections between the Carburettor and the manifold for the purpose ot warming the gas at is leaves the carburetter. Vhile such devices prove serviceable during the months ot cold weather, have found that they are located too near the manifold and too remote from the cylinders to give the best resalts. Such deviees also do not give the intense heat that can he obtained from the use of my manifold heater.

My manifold heater is however adapted tor other uses than the one specifically deserihed. As an oil heater for thinning and Warming the oil when starting the engine in cold weather, my deviee has proved to be remarkably successful under rigid tests. F or this purpose the heater is made in a somewhat larger size but it is inserted through the u'all of the crank ease in the same manner as with the manifold.

Having thus described my invention in terms which Will be readily understood by others skilled in the art to which it pertains, what I believe te be neuv and desire to secure by vLetters Patent ot the United States is l. A.. manifold heater Comprising a plug, said plug being provided with a central conical aperture extending therethrough, a conieal shaped conducting eore seated Within the aperture et said plug, said core heing surrounded by anl insulating' sheath, a hinding post integral with said core, an insulated Washer surrounding said binding post and bearing against said Washer to seeure the Lmaeal core tightly in the aperture of the plug, and a resistance Coil surrounding said insulated sheath, one of the terminals of said resistanee eoil communicating through said plug with the binding post and the other oi the terminals having its ground connection in said plug'.

2.' A manifold heater Comprising a cylinder which is closed at one end, a plug for closing the other end of said cylinder, said plug being provided with a Central conical aperture, a Conducting eore which is so shaped as to fit snugly into the aperture of said plug, said core being surrounded by a sheath o't insulating material, a binding` postv integral with said coreV and projecting from said plug, a resilient insulated washer surrounding said binding post and hearing against said plug, said binding post bearing against said Washer for firmly drawing said Core into aperture of said plug, and a resistanee eoil surrmindingsaid insulating sheath, said resistanee coil being grounded in said plug and having its other terminal in the inner extremity ot said eore.

In testimony Whereotl l aftix my signature.

EUGENE G. SIEGFRIED. 

